Effect of the residual water content in gels on solution combustion synthesis temperature

Халиуллин, Ш. М.; Журавлев, В. Д.; Бамбуров, В. Г.; Khort, Alexander; Roslyakov, Sergey; Трусов, Г. В.; Moskovskikh, Dmitry

doi:10.1007/s10971-019-05189-8

Cited by 28 publications

(9 citation statements)

References 39 publications

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“…The fast drying allows obtaining precursor in the form of a porous easy combustible foam. The temperature of the furnace for SCS reaction initiation was chosen based on an analysis of the result of our previous study 14,36,37 . It was shown, the decomposition of the precursor as a result of the combustion reaction mostly finishes up to ∼ 500 °C.…”

Section: Synthesismentioning

confidence: 99%

CO oxidation and organic dyes degradation over graphene–Cu and graphene–CuNi catalysts obtained by solution combustion synthesis

Khort

Romanovski

Leybo

et al. 2020

Sci Rep

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Graphene and its analogs in combination with metal nanopowders are among the most promising catalysts for various industry valuable processes. The newly obtained solution combustion synthesized graphene–Cu and graphene–CuNi nanocomposites were examined in heterogeneous catalysis of thermal activated CO oxidation and photoactivated degradation of acid telon blue and direct blue dyes. The nanocomposites are characterized by a closely connected solution combustion synthesized graphene-metal structure with a number of graphene layers from 1 to 3 and fine metal grains sizes of 31 nm (Cu) and 14 nm (CuNi). The experimental data showed the obtained graphene-metal nanocomposites are among the most effective catalysts for CO oxidation with a temperature of 100% conversion of 150 °C and 200 °C for Cu and CuNi containing catalysts, respectively. At the same time, both nanopowders were found inactive for dyes degradation.

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Section: Synthesismentioning

confidence: 99%

CO oxidation and organic dyes degradation over graphene–Cu and graphene–CuNi catalysts obtained by solution combustion synthesis

Khort

Romanovski

Leybo

et al. 2020

Sci Rep

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“…As shown in [6], the addition of even a small amount of glycine to it already contributes to the formation of the Ni 0 impurity. Further studies [9][10][11][12][13] have shown that the predominant formation of the nickel metal phase, as a combustion product, is observed in the fuel-rich conditions. In situ studies have established that Ni 0 is formed as a result of the reduction of NiO formed at the combustion stage [7,12,14,15].…”

Section: Introductionmentioning

confidence: 98%

New Solvent-Free Melting-Assisted Preparation of Energetic Compound of Nickel with Imidazole for Combustion Synthesis of Ni-Based Materials

et al. 2021

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In this work two approaches to the synthesis of energetic complex compound Ni(Im)6(NO3)2 from imidazole and nicklel (II) nitrate were applied: a traditional synthesis from solution and a solvent-free melting-assisted method. According to infrared spectroscopy, X-ray diffraction, elemental and thermal analysis data, it was shown that the solvent-free melt synthesis is a faster, simpler and environmentally friendly method of Ni(Im)6(NO3)2 preparation. The results show that this compound is a promising precursor for the production of nanocrystalline Ni-NiO materials by air-assisted combustion method. The combustion of this complex together with inorganic supports makes it possible to synthesize supported nickel catalysts for different catalytic processes.

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“…We report new promising methods for producing nanopowders of fivecomponent TaNbHfZrW high-entropy alloy and (TaNbHfZrW)N high-entropy ceramics with uniform composition and particle size. The proposed approaches combine solution combustion synthesis [10][11][12] and reduction of metals from the salt mixture using self-propagating high-temperature synthesis (SHS) [13,14].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of TaNbHfZrW-Based Nanopowders by Thermolysis of Transition Metal Halides in the Form of Dry Mixtures and Gels

et al. 2021

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High-entropy alloys and ceramics as a new class of materials containing five or more elements are attracting increasing interest due to their unique structure and potential applications. In this work, we investigate the feasibility of the combustion synthesis of high-entropy alloys and ceramics in the Ta-Nb-Hf-Zr-W-Mg and Ta-Nb-Hf-Zr-W-Cl-Mg-N systems from chloride precursors. To this end, we analyzed the stability of metallic, chloride, nitride and hydride phases in the 0-2000°C temperature interval by varying the chemical potentials of the gaseous elements (chlorine and nitrogen). Two synthesis methods were developed: combustion of powder mixtures of transition metal chlorides with the reducing agent (Mg 3 N 2 ), and combustion of gel mixtures. Combustion of the powder mixtures produced highly porous sinter cakes consisting of needle-like nanoparticles of high-entropy Ta + Nb + Hf + Zr + W alloy in the matrix of magnesium oxychloride. Combustion of the gels yielded spherical nanopowders with uniform composition and particle size. However, high reactivity of the synthesized powders led to their rapid oxidation due to the abundance of oxygen in the gel-forming agent (C 2 H 5 OH).

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Effect of the residual water content in gels on solution combustion synthesis temperature

Cited by 28 publications

References 39 publications

CO oxidation and organic dyes degradation over graphene–Cu and graphene–CuNi catalysts obtained by solution combustion synthesis

CO oxidation and organic dyes degradation over graphene–Cu and graphene–CuNi catalysts obtained by solution combustion synthesis

New Solvent-Free Melting-Assisted Preparation of Energetic Compound of Nickel with Imidazole for Combustion Synthesis of Ni-Based Materials

Synthesis of TaNbHfZrW-Based Nanopowders by Thermolysis of Transition Metal Halides in the Form of Dry Mixtures and Gels

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